Crimping-tongs



(NoModel.)

F. R. PAGKHAM.

GRIMPING TONGS.

Patented Mar. 6,1883.

Will# i-mm e196 (no.

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Uivrrno *raras thrice@ ernaar FRANK R. PAOKHAM, OF MEOHANIOSBURG, OHIO,ASSIGNOR `TO JOHN O. BAKER, OF SAME PLACE, AND J. B. V-AN DOREN, OFFREMONT, OHIO.

CRlNlPlNG-TONGS.

SPECIFICATION forming part of. Letters Patent No. 273,382, dated` March6, 1883.

Application ledNovember 15, 1882. (No model.)

To all whom it may concern Be it known that I, FRANK R. PACKHAM, acitizen .ot the United States, residing at Mechanicsburg, in the countyo'f Champaign and State ot' Ohio, have invented a certain new and usefulImprovement in Crimping-Tongs, of which the following is av full, clear,concise, and exact description, reference being had to the accompanyingdrawings, forming a part ot' this specification.

My invention relates to a device for crimpy ing sheet metal.

The object of my invention is to provide a crimping device in the natureot' a pair of tongs particularly adapted to crimping the ends ofsections orjoints ot' sheet-metal pipe for the purpose of tapering thesame, so that the di'erent sections so crimped may be readily joinedtogether in the ordinary manner.

My invention consists of a pair ofjaws, each provided withV a series ofserrations or lutes of equal depth throughout their length, incombination with a pin which pivots said jaws together, and which is soplaced in relation to said jaws that when closed together theserrationsinthe differentjaws willbecompletely engaged at one end and hegradually separated toward the other end, whereby crimps or flutes of adepth gradually decreasing to a featheredge may be produced.

My invention further consists in providing crimping-tongs withdetachable jaws, the working-faces of which are provided with serrationsAot' a different character from those in the permanent jaws, the otheror outer faces of said detachable jaws being formed to lit theserrations ofthe permanentjaws, whereby the sameY tongs may be adaptedto perform ditterent kinds ot' work.

My invention further consists in certain constructions and combinationsof parts, as hereinafter more fully described and claimed.

In the accompanying drawings, which form a part of this specification,Figure l is a view illustrating the manner of using my improvedcrimping-tongs. Fig. 2 is a side elevation View of the tongs, showingthe detachable jaws inserted for use. Fig. 3 is a partial sectionalelevation, showing the tongs arranged for use without the detachablejaws. Fig. 4 is a perspective view ofthe detachable jaws removed,

a feather-ed ge.

vand Fig. 5 is a sectional view taken on the line x in Fig. 2.

Like parts are indicated by similar letters of reference in thedifferent views.

In the said drawings, a and b represent respectively the handles of thetongs, which are pivoted together by a pin, p.

c and Z are the permanent jaws, each ot' which is made in a single piecewith one of the handles a b, and each provided with a series ofserrations or flutes, e e, of an equal depth throughout their length. Y

c d are the detachablejaws, provided on their outer faces withserrations c' c', which correspond with the serrations e cot' permanentjaws b c, and provided on their inner or working faces with diagonalserrationsj'f. These serrations f f are of a graduallydecreasing depthfrom heel to point ot'jaw.

rlhe handles a and b are each provided with two holes, g and h, vfor thepin 19.

VWhen it is desired to used the tongs without the detachable jaws thepiu 19 is inserted through the holes h h, which are so placed in areclosed the jaws are brought into the relative position shown in Fig.S-that is, at an angle with each other-so that while the serrationsCompletely enga-ge at the heel of the jaws they separate graduallytoward the point.

To crimp a piece ot' metal or the end of a pipe, the metal is insertedbetween the jaws, which are then closed together by means ot' thehandles a b. The serrations in the respective jaws coming entirelytogether at the heel of thejaws, the crimps produced in the metal willbe at this lpoint of a depth corresponding tothe depth ofthe serrationsin the jaws; but by reason of the relative position ot' the jawsabovestated the said crimps in the metal will gradually decrease in depth upto Orimps or ilutes when thus formed in the metal ot' a pipe at its endproduce a perfect taper in the pipe at the end so crimped.

When it is desired to use the detachable jaws the pin p is put throughthe holes g g. rEhe detachable jaws are then inserted in the permanentjaws, with their straight serrations e e' fitting in those, e e, insaidpermanent jaws. The detachable jaws are then secured IOO in thisposition by a small screw, s, or in any other suitable manner. Thetongslnay be now used for producing diagonal crimps, and the scrrationsbeingof gradually-decreasin g depth a taper may be produced, as before.In ordinary work the straight scrrations in the 'permanent jaws will beused; but in crimping stove-pipe ot' an inferior quality the diagonalserrations are preferable, as by their use the crimps are produced invthe metal across the grain. The metal, when thus crimped, will not beapt to split, as is sometimes the case when the crimps are made in themetal parallel with the grain.

I make tbe jaws in cross-section on the arc of a circle, as shown inFig. 5, when intended exclusively for crimping pipe, so that thecircular form of the pipe will be retained. This is particularlydesirable when the tongs are to be used for crimping small pipe.

It is evident that the relative position of the straight and diagonalscrrations may be reversed and the same result be obtained-that is, thediagonal serrations may be placed in the permanent jaws and thestraightserrations in the detachable jaws.

lf desired, the jaws c d may be placed at an angle to the handles a bwithout departing from the spirit ot' my invention; and, indeed,

this may be found advantageous in some kindsof work.

Having described my invention, I claim as new and original- 1. Thecombination, with the jaws c and d, each provided with a series ot'scrrations ot' equal depth throughout their length, ot' a pin, p,pivoting said jaws together, said pin being so placed in relation tosaid jaws that when closed together the scrrations in the differentjaws, while being completely engaged at one end, will be graduallyseparated toward the other end,substantially as an'd for the purpose setforth.

2. The combination, in a pair of crimpingtongs, of a pair of permanentpivoted jaws with a pair of detachable jaws,said permanent jaws eachprovided with a series of serrations, the scrrations of one jaw beingadapted to fit those of the other jaw, and said detachable jaws eachserrated on one face to correspond with the scrrations in one of thepermanent jaws, and each provided on the other or working face withserrations of a ditferentcharacter from the scrrations in the permanentjaws.

3. The combination of the pivoted jaws c c1, each provided with a seriesot` scrrations, the scrrations inthe different jaws being adapted to fiteach other, said jaws being formed in cross-section on the arc ot' acircle and relatively adapted to produce crimps of a graduallydecreasngdepth,substantia1ly as and for the purpose set forth.

4. In a pair of crimping-tongs, the combination, with a pair ot'permanent jaws, ot' detachable jaws adapted to be inserted in thepermanent jaws, one pair of said jaws being provided with a series ofstraight scrrations -and the other pair provided with diagonalserrations, substantially as and for the purpose set forth.

5. The combination, with the handles ab, each provided with holes g It,and permanent jaws c d, having scrrations e e, of detachable jaws c d',having scrrations jfot' a different character from those, e e, in thepermanent jaws, substantially as shown and described.

6. 'lhe combination, with the pivoted jaws a b, formed in cross-sectionon an are of a circle, and provided with scrrations e e ot' equal depththroughout their length, of a pin, p, so placed that when closedtogether said jaws will form an angle with each other, substantially asshown and described,and for the purpose set forth.

In witness whereof I hereunto subscribe my name this 27th day ofOctober, A. D. 1882.

FRANK R. PAOKHAM.

itnesses T. E. SHEPHERD, A. J. SHEPHERD.

